Process of generating steam.



No. 677,292. Patented June 25,191".

8. M. TRAPP. PROCESS or GENERATING STEAM.

(Application filed July 5, 1900.)

(No Model.)

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SAMUEL M. TRAPP, OF SEATTLE, TVASHINGTON, ASSIGNOR OF ONE-HALF TO \VILLIAM H. REMINGTON, OF TACOMA, XVASHINGTON.

PROCESS OF GENERATING STEAM.

SPECIFICATION forming part of Letters Patent No. 677,292, dated June 25, 1901.

Application filed July 5, 1900. Serial No. 22,595. (No model.)

To all whom, it nuty concern:

Be itknown that LSAMUEL M. TRAPP,a citizen of the United States, residing at Seattle, in the county of King and State of WVashington, have invented certain new and useful Improvements in Processes of GeneratingSteam and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawing, and to the letters of reference marked thereon, which forms a part of this specification.

I5 Myinvention consists in a process of generating steam in a boiler by the action of superheated steam or hot air injected into direct contact with the water in the boiler as contradistinguished from generating the steam by radiated or conducted heat.

It also consists in the generation of the steam by injecting the heating agent of high temperature, either steam or hot air, into direct contact with the water in conjunction with a heating agent, such as steam or heated products of combustion, passed through the body of the water by means of pipes or tubes, so as to apply heat by conduction or radiation to the body of the water.

It further consists in the process of generating steam by injecting into direct contact with the water steam or hot air heated to a high temperature, the steam or hot air at the point of discharge into the water being protected against being chilled by the lower temperature of the water.

In carrying out my invention the steam maybe taken from the boiler itself and superheated in suitable coils located in the firebox of the boiler and thence conducted into the boiler below the water-line and there injected into direct contact with the body of the water, or it may be taken from any other source than the boiler and superheated in any other manner than that mentioned, and if hot air is used instead of steam the air may be superheatedin suitable coils arranged in the fire-box of the boiler or superheated elsewhere and conducted into the boiler and there injected into the body of the water below the water-line of the boiler.

As a suitable means for carrying out my process I have illustrated in the drawing a suitable apparatus, the drawing illustrating a Vertical longitudinal section through a boiler-furnace adapted to carry out the process.

In the drawing the letter a represents the boiler, with steam-dome 1),. stack 0, flue or fiues d, and a furnace or fire-pit e. Arranged in any convenient location in the fire-pit is a superheaterf, connected at one end to an expansion-chamberg, which in turn is connected by pipes 71 with some part of the boiler above the water-line-for instance, with the steam-dome b-so as to draw steam therefrom. The other end of the superheater is connected to a regulating delivery and dis tributing tube or device 2', provided with a plurality of outlets or nozzles j, leading into the water in the boiler. I prefer to place the tube 2' itself within the boiler, as shown, and to surround it with an insulating-coating k, the inner part of which is fireproof and the outer part waterproof, so as to prevent the superheated steam or the hot air which will be delivered into the tube '5 from becoming chilled by the body of water in the boiler about the tube, thus maintaining the heating agent at the point where it will be injected into the body of water at a high temperature. All of the outlets or nozzlesj are provided with regulating valve devices or gates m, adapted to operate in unison and be connected for this purpose to a common operating-rod n, having a handle or operatinglever 0 outside of the boiler, so that the delivery-apertures of all the nozzles can be simultaneously adjusted to correspond to the requirements at any particular time. At suitable places in the superheater connectionsfor example, at p in the intake-pipe and at q in the delivery-pipe-are arranged checkvalves which permit passage of steam only in one direction-namely, toward the deliV- ery end, as indicated by the arrows. The regulating and delivery tube 1' contains a smaller tube 1", extending almost its entire length and opening at an end into the outer tube 6 and at its other end to the atmosphere, so that when a valve 3 in said tube r is open steam will pass from the superheater the whole length of tube 71 and thence through inner tube r to the outer air. A hand-valve) is provided in the intake-pipe h. 105

The process is worked as follows: Steam is incoming superheated steam from the superheating-coil or other source. After the tube t' has thus been preliminarily heated and the,

steam coming from the superheater is redhot, or substantially so, the tube 71 is closed by the valve 3, so that the steam will not pass out into the atmosphere, and the handlever 0 is operated to open the gates m, and the superheated steam is then forced by-its own expansive tendencyinto and through the water in the boiler, thus imparting to the latter theheat which it has received in the superheater. The tube '0' having beenpreliminarily heated, as mentioned, the steam from the superheater entering the tube 2' is injected into the body of the water without having its temperature lowered, the preliminary heating of the tube 2' to a temperature above that of the water preventing the water from chilling the steam received into the tube 1 from the superheater. The steam thus being injected into the body of Water while red-hot-will cut or evaporate its way into the water, and by the gravitating action of the water the steam will be forced upwardly through the same. This injection of the red hot steam into the boiler waterproduces a most powerful heating effect and will constitute the main steam -eproducing elementin the boiler. This injection of the steam into the body of the water also supplements the heating action ofthe ordinary heating-tubes extending through the boiler, and thus the action of one of said heating means is supplemented by that of the other, and the evaporative capacity of the boiler will thus be materially increased.

Instead of admitting steam and injecting it into the body of water, as described, I may employ highly heated air instead of steam, said air-being employed in the same manner as that described for the steam, except that the heated air may be taken from any suitable source instead of taking steam from the boiler, and said air maybe impelled through the superheater in the fire-box by means of a pump suitably connected with the pipes or coils, and this highly-heated air after being applied to heat the tube 2', as previously described for the steam, will subsequently be injected into the body of the boiler-water in the same manner as before described for the steam, the preliminary heating of the tube 1 preventing the hot air being chilled by the Water in the boiler.

While I have illustratedv and described an apparatus suitable for carrying out my process, it must be understood that the process is not confined in its working to the employment of such an apparatus, as the process is entirely independent of the form of apparatus that may be employed. It is to be further understood that the apparatus illustrated is not claimed in this application, but will form the subject of a separate application therefor. It is also to be noted that in working the process herein described the superheated steam from the superheater is caused by its own expansive pressure to move forward in the direction of the point of injection into the body of the water, the checkvalves in the steam-supply pipe preventing backward pressure and the preliminary heating of the tube 1' causing the steam to be injected under its full expansive pressure into the body of the water.

Having described my invention and set forth its merits, what I claim is- 1. The process of generating steam which consists in forcing, by its own expansive pressure, a current of steam heated to ahigh temperature into the water to be evaporated, the steam being protected'against reduction of its temperature at thepoint of discharge into the water by being received into a delivery-chamber preliminarily heated and maintainedat a temperature above the temperature of the water.

2. The process ofgenerating steam which consists in applying heat by radiation or conduction to the body of the water and supplementing the sameby injecting directly into the body of water a heat-producing agent at a high temperature,the temperature of said heating agent being maintained against the lowering of its temperature at the point of discharge into the water.

3. The process of generatingsteam-which consists in injecting into the body of the water a heating agent at a high temperature, said agent being superheated previous to its injection into the water, and preventing chilling of said superheated agent by the body of the water at the point of its injection into the water.

4. The process of generating steam which consists in heating to a high temperature a heat-imparting agent, delivering said agent into a chamber or channel under the body of .water to be heated, said chamber or channel being heated to and maintained ata temperature higher than that of the water above it so as to prevent the heating agent being chilled, and injecting said heating agent directly into the body of the water.

In testimony whereof I affix my signature in presence of two witnesses.

. SAMUEL M. TRAPP.

\Vitnesses:

W. H. REMINGTON, SIDNEY PLUMMER. 

